High · published January 13, 2026
⚡ An authorized attacker could use this untrusted pointer dereference to elevate their privileges right under your nose! 🦸♂️ Think of it like a guest at a hotel sneaking into a staff-only area because they found a door that wasn’t locked — they have access to sensitive operations that should have been off-limits! This vulnerability allows an attacker with local access to gain elevated privileges, potentially leading to a complete takeover of the system. They could manipulate files, alter settings, or even install malicious software, all without detection. The consequences could be absolutely devastating for any system that falls victim to this breach.
Think of it like a guest at a hotel sneaking into a staff-only area because they found a door that wasn’t locked — they have access to sensitive operations that should have been off-limits! CVE-2026-20857 in the Windows Cloud Files Mini Filter Driver occurs due to an untrusted pointer dereference, which allows local attackers to exploit this flaw for privilege escalation.
This vulnerability allows an attacker with local access to gain elevated privileges, potentially leading to a complete takeover of the system. They could manipulate files, alter settings, or even install malicious software, all without detection. The consequences could be absolutely devastating for any system that falls victim to this breach. To remediate this vulnerability, ensure you apply the latest Microsoft security updates. Regularly monitor and manage permissions for local users and audit your security policies to mitigate any potential threats. This is fixable! Stay proactive, follow these steps, and you’ll bolster your defenses in no time. 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| microsoft/windows_10_1809 | < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft/windows_10_1809 | < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft/windows_10_21h2 | < 10.0.19044.6809 | 10.0.19044.6809 |
| microsoft/windows_10_22h2 | < 10.0.19045.6809 | 10.0.19045.6809 |
| microsoft/windows_11_23h2 | < 10.0.22631.6491 | 10.0.22631.6491 |
| microsoft/windows_11_24h2 | < 10.0.26100.7623 | 10.0.26100.7623 |
| microsoft/windows_11_25h2 | < 10.0.26200.7623 | 10.0.26200.7623 |
| microsoft/windows_server_2019 | < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft/windows_server_2022 | < 10.0.20348.4648 | 10.0.20348.4648 |
| microsoft/windows_server_2022_23h2 | < 10.0.25398.2092 | 10.0.25398.2092 |
| microsoft/windows_server_2025 | < 10.0.26100.32230 | 10.0.26100.32230 |